Water-cooled brake for vehicles.



L. GOLDMERSTEIN.

WATER COOLED BRAKE FOR VEHICLES.

APPLICATEON FILED SEPT. 21, l9l6.

Patented Feb. 27, 1917.

LEON GOLDMERSTEIN, OF NEW YORK, N. Y.

WATER-COOLED BRAKE FOR VEHICLES.

Specification of Letters Patent.

Patented Feb. 27, 191 *7.

Application filed September 21, 1916. Serial No. 121,476.

Toall whom it may concern Be it known that I, LEON GOIDMERS'I'EIN,subject of the Czar of Russia, residing in New York-city, in the countyand State of New York, have invented a new and useful Water-Cooled Brakefor Vehicles, of which the following is a specification.

My invention refers to water cooled brakes for vehicles such asautomobiles, and in particular provides a' brake which may be safelyused on a car in cold weather without incrfeasing thereby the attendantdanger of freezing.

In water cooled engines there is always present the danger of the waterfreezing in cold weather. This is partly obviated by using in wintertime mixtures having a lower freezing point than pure water, 0. 9.mixture of water and wood alcohol. Another method of protecting theradiator from freezing is that of covering it up so as to save as longas possible the heat in the en-- gine parts. In fact, when a car is lefton the street in very cold weather, this is the only way of protectingthe water from freezing, the addition of alcohol being effective only inpartly heated garages. I

When it comes however to the matter of cooling the brakes, neither ofthe above methods, the only ones known, can be effectively applied.Additions of alcohol will not prevent the water freezing when the car isleft for a longer period on the street at temperatures around zeroFahrenheit, while there is no way known of covering the entire coolingsystem in such a way as to keep the cooling water around the brakes warmthrough the heat of the engine. In fact, even were there such a way, itcould not be eifective because the amount of heat present in an idleengine is very limited, and would be rapidly dissipated if applied toany extensive area.

In the present invention the problem is solved by limiting the possiblezone of freezing to the radiator only, and by providing means fortransferring to the radiator all the water used for brake cooling,immediately upon the stopping of the enne. The figure shows the radiatorwith the cellular cover removed.

Water fromv radiator 1 is taken to the brake cooling system through,pipe 3 so located that the hump of its bend is always above the highestwater level in the radiator (indicated by the broken line 22). With thecooling system in operation, 2'. 6. engine runnlng, the waterpasses'down through the open valve 17 to pipes 5 and 6 which lead to thebrake water cooling jackets 7 and 8. Thence the water proceeds to flow,through pipes 9 and 10, to the pan 11.

From pan 11 the water. is taken, by suction, through pipe 12, toacompartment 2 of the radiator made preferably of thin sheet metal andhaving no direct water or air communication with rest of the radiator.From 2 the water is taken, by pipe 13, to the suction pump 14, and bythis pump and pipe 16, delivered back to the radiator. The suction pump14 is provided with two valves, 23 and 24, so arranged that liquid canflow from 2 to 1, but not back again. These valves may be simple flapvalves.

In other words, the pump produces a vacuum in the radiator compartment 2which spreads to the pan 11, and creates a suction which raises waterthrough the hump in the pipe 3. Hence, as long as the pump is running,2'. e. as long as the engine 1s running water will circulate through thebrake cooling system.

As soon as the engine stops, however, valve 17 closes pipe 3 and opensan auxiliary pipe 4, as shown in the drawing. At the same time the pump14, driven by the engine, stops. Hence there is atmospheric pressurecoming from pipe 4 (so arranged that its outlet is always above the highwater level in the radiator) all through the cooling system down to pan11, and at the same time there is a vacuum in compartment 2; therefore,all the water present in the system will run over into compartment 2 andno new water can come in as valve 17 is shut. There will in that case beabsolutely no danger of the brake cooling pipes or pan freezing, asthere will be no water in it.

Valve 17 is so arranged that it always keeps closed one of the twopipes, 3 or 4. When the engine is running it is pipe 4 that is keptclosed while pipe 3 is open, so that the suction of the pump draws inwater while air is kept out. On the other hand, when the engine stops,the valve closes pipe 3 and opens pipe 4: All further water supply iscut off, but air pressure is admitted to drive the water over from pan11 into compartment 2. There may be a number of ways to accomplish thisresult of closing or opening of the valve 17. By way of an example, onesuch method is indicated in the drawing. No claim to novelty in its useis made here, except as part of the present invention.

A conical pendulum 18 is driven from the engine by a belt and pulley 21.When the engine is running, the balls fly apart and draw up the sleeve19 which pulls on the cord 20 operating the valve, the arrangement beingsuch that in this position the valve hicle brakes having mechanicalcirculatingmeans, the combination of siphonage means to continue thefluid flow upon the cessation of activity of said mechanical circulatingmeans.

2. In a fluid cooling system for the brakes of motor vehicles, havingmechanical circulating means, operated by the motor, the combination ofsiphonage means to continue the fluid flow, means for changing from themechanical to the siphonage system, and means actuated by the motor, instopping, to

control said changing means.

3. In a fluid brake cooling system for motor vehicles, having aradiator, motor operated means for circulating fluid through a pathincluding the radiator and brake, a fluid controlling valve in said pathbetween the radiator and brake, means actuated by the motor to hold saidvalve open while the motor is in operation and to close it with thestopping of the motor, and a siphonage system also controlled by saidvalve, to remove remaining fluid from the brake by the movement of saidvalve in its operation of closing said circulating path.

4. The combination, in a motor vehicle, having a radiator and a brake,of a fluid cooling system whose path includes said radiator and brake, afluid container in said radiator, and mechanical means, operated by themotor, to pump fluid from said radiator, to said brake, and thence,through said container, back to said radiator.

5. The combination, in a motor vehicle, having a radiator and a brake,of a fluid cooling system whose path includes said radiator and brake, afluid container in said radiator, and mechanical means, operated by themotor, to pump fluid from said radiator, to said brake, and thence,through said container, back to said radiator, together with means forsiphoning fluid from said brake to said container when the motor isidle.

6. The combination, in amotor vehicle, having a brake, of a mechanicalfluid flow cooling system forsaid brake, and a siphonage drainingsystem, and motor controlled means whereby said mechanical systemfunctions during the running of the motor, and said siphonage systemfunctions when the motor is idle.

7. In a fluid brake cooling system for motor vehicles, in combination,a. pipe to convey water to said cooling system from the radiator, a pipeleading to the atmosphere, and a valve to keep the air pipe closed whenthe engine is running, and the water pipe closed when the engine isidle.

8. In a brake cooling system where water i is used as a cooling agent, acombination of two pipes of which one conveys water to the said coolingsystem from the radiator, and the other leads to the atmosphere, a valvewhich keeps the air pipe closed when the engine is running, and thewater pipe closed when the engine is idle, and a centrifugal governor,driven from the engine, to operate said valve.

9. In afluid brake cooling system for motor vehicles, including a brakejacket, the combination of a radiator, piping to convey the coolingfluidto the jacket, outflow piping to convey the water from the jacket, acontainer below the level of the brake to collect the cooling fluid, acontainer in the engine hood, piping to convey the fluid thereto, a umpto produce the suction necessary for t e operation of the fluidcirculation, and piping to return the cooling fluid to the radiator.

10. In a fluid brake cooling system including a brake jacket, thecombination of a radiator, piping to convey the cooling fluid to thebrake jacket, outflow piping to convey the fluid from the brake jacket,a container under the motor hood, piping to further convey the fluid tosaid container, a pump to produce a vacuum in said container, and meansto stop the flow of fluid from the radiator when the engine stops, andat the same time to admit 'air pressure to the brake jacket.

Signed in New York, in the borough of Manhattan, county and State of NewYork, in the presence of two witnesses.

LEON GOLDMERSTEIN.

Witnesses:

G. T. CARPENTER, F. J. TOLTON.

